.title{
    font-weight: 700;
    font-size: 30px;
    color: #333;
    margin-bottom: 32px;
}
.nav_title{
    margin-bottom: 50px;
    border-bottom: 1px solid #ededed;
    color: #666;
    font-size: 14px;
    padding-bottom: 14px;
    box-sizing: border-box;
}